Gas content, geochemical characteristics and implications of coalbed methane from the Deep Area of Qi'Nan Coalmine in Huaibei Coalfield.

In addition, the value of which shows a slight increasing trend with three exceptions in the range of 600–800 m, and then the value has a decreasing trend in the range of 800–1249.60 m.

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In addition, the indicative significance of δ 13 D CH4 has been proposed by Yu et al.

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